Robokeeper
The Robokeeper is a robot-like, automatic soccer goalkeeper , whose function is based on the classic tip-kick goalkeeper. It was developed at the Fraunhofer Institute for Material Flow and Logistics in the Department of Machines and Systems.
functionality
The system consists of a goalkeeper figure attached to a motor - gearbox combination with high power density and dynamics. The drive and the associated motor control, and two Gigabit color cameras are connected to an evaluation computer, on the rapid 3D - image processing software running.
Fending off a shot on goal works by recording the ball , which contrasts in color with its surroundings, by the cameras with up to 90 images per second and tracking it during the flight. From this data, the image processing software determines the likely point of impact in the goal and forwards this result as an angle value to the motor control, which then rotates the goalkeeper figure by the required angle. The first result is available approx. 50 msec after shooting, at a shooting speed of 100 km / h the ball has already traveled 1.5 meters. The drive needs a time of 300 msec in which the ball flies another 8.5 meters for the longest distance, i.e. a swivel from the vertical rest position by 90 ° to the left or right. The Robokeeper can therefore hold shots from the penalty spot "flat in the corner" at a speed of 100 km / h. A drive with a motor power of 21 kW accelerates (and brakes) the goalkeeper figure with 20 times the acceleration of gravity (and thus 17 times higher than in a Formula 1 car), the fingertips of the figure reach a top speed of 53 km / h .
The goal has a width of 4 meters and a height of two meters, the goalie figure is 2.05 meters long. The shot is with an orange artificial leather ball with a diameter of 23 centimeters. Due to the dimensions of the goal and the goalkeeper figure, there is a space of around 60 centimeters in each of the top two right and left goal corners, so that an experienced shooter such as Lionel Messi can overcome the Robokeeper with a precise shot.
commitment
After the development and presentation at a trade fair in 2007, public interest was so strong that the system has been marketed worldwide by a sports marketing and event agency ever since. In the meantime (as of March 2015) there are 16 systems that are used worldwide both on a daily basis at events and in stationary applications in sports and leisure facilities. For example, during the European Football Championship in 2008, visitors were able to get to know and challenge the Robokeeper at public viewing events in Germany and Austria. There were other appearances at major sporting events, for example during the Women's World Cup in Berlin, during the ConFed Cup 2013 in Brazil in Belo Horizinte and Rio de Janeiro, and during the 2014 World Cup in Beijing and Dubai.
Due to the positive response, the system was further developed in 2011 and adapted for field hockey and ice hockey : In this variant, the goal and the goalkeeper figure are only half the size and a field hockey ball or ice hockey puck is used shot from a distance of 6 meters. Through the use of cameras with higher resolution and an even faster rotating motor, the Robokeeper can only be overcome with a precise shot in the upper corner of the goal up to a ball or puck speed of approx. 100 km / h. These modules were used, for example, at the European Hockey Championships 2011 in Mönchengladbach and during the 2013 Ice Hockey World Championships in Stockholm.
Web links
Individual evidence
- ↑ RoboKeeper automatic goalkeeper - Fraunhofer IML. In: iml.fraunhofer.de. Archived from the original on April 2, 2015 ; accessed on March 30, 2015 .
- ↑ lecture Robokeeper at the VDI Congress Mechatronics on 12 May 2009 in Wiesloch https://commons.wikimedia.org/wiki/File:Vortrag_RoboKeeper_VDI-Mechatronikkongress_2009.pdf